1. CRH

CRH plc is an international building materials group. The group was formed through a merger in 1970 of two leading Irish public companies, Cement Limited (established in 1936) and Roadstone Limited (1949). It is headquartered in Dublin.

2. Trane Technologies

Formerly Ingersoll-Rand, Trane Technologies was formed in early 2020 when part of the business separated and combined with Gardner Denver (which now trades as Ingersoll Rand Inc). Trane is listed on the NYSE. The industrial techology firm makes climate control system...

3. Kingspan

Kingspan manufactures insulation and building envelope solutions for the construction industry. It is based in Ireland but has operations in western and eastern Europe, the United States, India, Australasia and the Middle East.

4. Grafton

The Grafton Group plc is a builders merchanting, DIY retailing and mortar manufacturing markets in Britain and Ireland. In Ireland it trades under the brands Woodie’s DIY , Heiton Buckley, Chadwicks and MacNaughton Blair. These businesses turnover €2 billion from 600 lo...

5. E & I Engineering Ireland

E&I Engineering provides switchgear, power distribution solutions and energy management systems throughout Ireland, the UK and mainland Europe. Its team of chartered engineers manages every aspect of a project from concept design with consultants, manufacture, delivery,...

6. Mercury Engineering

Mercury is a privately-owned company headquartered in Dublin, Ireland. The company began in 1972 and has operations in Ireland, UK, Central Europe and Scandinavia. Mercury Engineering is a provider of solutions within the construction industry be it management contra...

7. Epsa Ireland

Epsa Ireland provides construction services. It is a subsidiary of Spanish group Epsa Internactional S.A.

8. Saint-Gobain Construction Products

Saint-Gobain Construction Products manufactures and supplies building materials. Formerly known as Gypsum it has operated in Ireland since 1936. In 2005, it became part of the Saint-Gobain group.

9. Abbey

Abbey plc is quoted on the ESM in Dublin, and the AIM Market in London. The company’s main activities are residential housing development in the United Kingdom, Ireland and Prague. It also has a plant hire division, M&J Engineers Ltd., based in the United Kingdom.

10. Sisk Group

SISK Group is a fith generation family business primarily known for the construction division John Sisk and Son which operates in Ireland, the UK, Poland and the Middle East. It has grown from a small local builder founded in Cork more than 150 years ago to an intern...

11. PM Group

Project Management Holdings provides design, engineering, architecture, project planning and construction management services. Its clients are in private industry and public sector and it concentrates on the biopharma, food, energy and healthcare sectors. It was...

12. KN Circet

KN Circet is an infrastructure and utilities services provider operating in Ireland, UK and internationally. Its areas of expertise span civil engineering, telecoms, construction, wireless technologies, rail infrastructure and home energy services. Its Irish office is l...

13. Jacobs Engineering

Jacobs is one of the world’s largest and most diverse providers of technical professional and construction services, including all aspects of architecture, engineering and construction, operations and maintenance, as well as scientific and specialty consulting. It s...

14. Caterpillar Northern Ireland

Founded in 1966, Caterpillar (NI) Limited is Europe's largest diesel generating set manufacturer. The company houses eight Caterpillar divisions across four sites in Northern Ireland and has global manufacturing facilities in Brazil, China, India and the USA. The compa...

15. Park Developments

Park Developments is a property development company. It is best know for The Park retail and office development in Carrickmines, Dublin. It is also involved in the development of the Greystones harbour project and has built residential schemes in Ticknock Hill, Sandyfor...

16. Cairn Homes

Cairn builds new homes.

17. Bam

BAM Contractors (formerly Ascon Contractors) is a wholly owned subsidiary of Royal BAM Group of the Netherlands. BAM Contractors covers the entire spectrum of construction in Ireland. Its subsidiary operating companies are: • BAM Civil (formerly Ascon) • BAM Buildi...

18. Graham

Graham is a privately owned company operating in the construction, asset management and project investment markets. The company is involved in construction through John Graham (Dromore) Ltd, in asset management through Graham Asset Management Ltd and investments through...

19. Northstone

Northstone (NI) Limited is a leading construction materials producer, utility chamber manufacturer and building and civil engineering contractor in Northern Ireland. The company has locations across Northern Ireland as well as in Co. Roscommon and in the UK. Northston...

20. Glennon Brothers

Since 1913, Glennon Brothers has been manufacturing timber products. Through Glennon Brothers plants in Longford and Fermoy, and Windymains Timber and Adam Wilsons in Scotland, it supplies both the Irish and UK markets with products for the construction, pallet wood and...